Re-org shared lib header files, remove unused info (#136)

And fix compile issues of vxworks

core/shared-lib/platform/vxworks/bh_definition.c

@@ -14,13 +14,9 @@
  * limitations under the License.
  */
 
-#include "bh_definition.h"
 #include "bh_platform.h"
 
-int bh_return(int ret)
-{
-    return ret;
-}
+#define RSIZE_MAX 0x7FFFFFFF
 
 int b_memcpy_s(void * s1, unsigned int s1max, const void * s2, unsigned int n)
 {
@@ -43,8 +39,9 @@ int b_memcpy_s(void * s1, unsigned int s1max, const void * s2, unsigned int n)
 
 int b_strcat_s(char * s1, size_t s1max, const char * s2)
 {
-    if (NULL
-            == s1|| NULL == s2 || s1max < (strlen(s1) + strlen(s2) + 1) || s1max > RSIZE_MAX) {
+    if (NULL == s1 || NULL == s2
+        || s1max < (strlen(s1) + strlen(s2) + 1)
+        || s1max > RSIZE_MAX) {
         return -1;
     }
 
@@ -55,8 +52,8 @@ int b_strcat_s(char * s1, size_t s1max, const char * s2)
 
 int b_strcpy_s(char * s1, size_t s1max, const char * s2)
 {
-    if (NULL
-            == s1|| NULL == s2 || s1max < (strlen(s2) + 1) || s1max > RSIZE_MAX) {
+    if (NULL == s1|| NULL == s2
+        || s1max < (strlen(s2) + 1) || s1max > RSIZE_MAX) {
         return -1;
     }
 

core/shared-lib/platform/vxworks/bh_platform.c

@@ -65,7 +65,7 @@ bh_read_file_to_buffer(const char *filename, int *ret_size)
 
     file_size = stat_buf.st_size;
 
-    if (!(buffer = wasm_malloc(file_size))) {
+    if (!(buffer = bh_malloc(file_size))) {
         printf("Read file to buffer failed: alloc memory failed.\n");
         close(file);
         return NULL;
@@ -76,7 +76,7 @@ bh_read_file_to_buffer(const char *filename, int *ret_size)
 
     if (read_size < file_size) {
         printf("Read file to buffer failed: read file content failed.\n");
-        wasm_free(buffer);
+        bh_free(buffer);
         return NULL;
     }
 

core/shared-lib/platform/vxworks/bh_platform.h

@@ -26,6 +26,8 @@
 #include <time.h>
 #include <string.h>
 #include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
 #include <assert.h>
 #include <stdarg.h>
 #include <ctype.h>